What should I do if I delayed the Ifadah circumambulation until the last day, along with the the Farewell circumambulation, and did not perform it?

It is permissible to delay the Ifadah circumambulation (Tawaf al-Ifadah) until the Farewell circumambulation (Tawaf al-Wada') and perform them both with a single intention. If one travels before performing the circumambulation, they remain in their state of ihram until they return to Mecca and perform the Ifadah circumambulation. Women are not permissible for him during that period. The Ifadah circumambulation is not compensated for by a دم (sacrificial animal/blood offering) because it is a pillar (an essential component).